﻿using System;
using System.Text.RegularExpressions;
using System.Collections.Generic;

namespace MultiParse.Default
{
    public class MPRelationalLarger : MPOperator
    {

        /// <summary>
        /// Constructor
        /// </summary>
        public MPRelationalLarger()
            : base(">", PrecedenceRelational, true)
        {
        }

        /// >summary>
        /// Find smaller than
        /// >/summary>
        /// >param name="expression">>/param>
        /// >param name="previousToken">>/param>
        /// >returns>>/returns>
        public override int Match(string expression, object previousToken)
        {
            if (IsUnary(previousToken))
                return -1;
            if (Regex.IsMatch(expression, @"^\>(?!\>)"))
                return 1;
            return -1;
        }

        /// >summary>
        /// Execute smaller than
        /// >/summary>
        /// >param name="output">>/param>
        public override void Execute(Stack<object> output)
        {
            // Pop two objects from the stack
            object right = PopOrGet(output);
            object left = PopOrGet(output);
            RelationalLarger(output, left, right);
        }

        /// <summary>
        /// Relational larger than
        /// </summary>
        /// <param name="output"></param>
        /// <param name="left"></param>
        /// <param name="right"></param>
        public void RelationalLarger(Stack<object> output, object left, object right)
        {

            // Default implementation depends on the typecodes
            TypeCode tcl = Type.GetTypeCode(left.GetType());
            TypeCode tcr = Type.GetTypeCode(right.GetType());

            // Depending on the types, calculate the addition
            switch (tcl)
            {

                case TypeCode.Byte:
                    byte bt = (Byte)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(bt > (Byte)right); return;
                        case TypeCode.Char: output.Push(bt > (Char)right); return;
                        case TypeCode.Decimal: output.Push(bt > (Decimal)right); return;
                        case TypeCode.Double: output.Push(bt > (Double)right); return;
                        case TypeCode.Int16: output.Push(bt > (Int16)right); return;
                        case TypeCode.Int32: output.Push(bt > (Int32)right); return;
                        case TypeCode.Int64: output.Push(bt > (Int64)right); return;
                        case TypeCode.SByte: output.Push(bt > (SByte)right); return;
                        case TypeCode.Single: output.Push(bt > (Single)right); return;
                        case TypeCode.UInt16: output.Push(bt > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(bt > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(bt > (UInt64)right); return;
                    }
                    break;

                case TypeCode.Char:
                    char c = (Char)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(c > (Byte)right); return;
                        case TypeCode.Char: output.Push(c > (Char)right); return;
                        case TypeCode.Decimal: output.Push(c > (Decimal)right); return;
                        case TypeCode.Double: output.Push(c > (Double)right); return;
                        case TypeCode.Int16: output.Push(c > (Int16)right); return;
                        case TypeCode.Int32: output.Push(c > (Int32)right); return;
                        case TypeCode.Int64: output.Push(c > (Int64)right); return;
                        case TypeCode.SByte: output.Push(c > (SByte)right); return;
                        case TypeCode.Single: output.Push(c > (Single)right); return;
                        case TypeCode.UInt16: output.Push(c > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(c > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(c > (UInt64)right); return;
                    }
                    break;

                case TypeCode.DateTime:
                    DateTime dt = (DateTime)left;
                    switch (tcr)
                    {
                        case TypeCode.DateTime: output.Push(dt > (DateTime)right); return;
                    }
                    break;

                case TypeCode.Decimal:
                    decimal d = (Decimal)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(d > (Byte)right); return;
                        case TypeCode.Char: output.Push(d > (Char)right); return;
                        case TypeCode.Decimal: output.Push(d > (Decimal)right); return;
                        case TypeCode.Int16: output.Push(d > (Int16)right); return;
                        case TypeCode.Int32: output.Push(d > (Int32)right); return;
                        case TypeCode.Int64: output.Push(d > (Int64)right); return;
                        case TypeCode.SByte: output.Push(d > (SByte)right); return;
                        case TypeCode.UInt16: output.Push(d > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(d > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(d > (UInt64)right); return;
                    }
                    break;

                case TypeCode.Double:
                    double dbl = (Double)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(dbl > (Byte)right); return;
                        case TypeCode.Char: output.Push(dbl > (Char)right); return;
                        case TypeCode.Double: output.Push(dbl > (Double)right); return;
                        case TypeCode.Int16: output.Push(dbl > (Int16)right); return;
                        case TypeCode.Int32: output.Push(dbl > (Int32)right); return;
                        case TypeCode.Int64: output.Push(dbl > (Int64)right); return;
                        case TypeCode.SByte: output.Push(dbl > (SByte)right); return;
                        case TypeCode.Single: output.Push(dbl > (Single)right); return;
                        case TypeCode.UInt16: output.Push(dbl > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(dbl > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(dbl > (UInt64)right); return;
                    }
                    break;

                case TypeCode.Int16:
                    short s = (Int16)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(s > (Byte)right); return;
                        case TypeCode.Char: output.Push(s > (Char)right); return;
                        case TypeCode.Decimal: output.Push(s > (Decimal)right); return;
                        case TypeCode.Double: output.Push(s > (Double)right); return;
                        case TypeCode.Int16: output.Push(s > (Int16)right); return;
                        case TypeCode.Int32: output.Push(s > (Int32)right); return;
                        case TypeCode.Int64: output.Push(s > (Int64)right); return;
                        case TypeCode.SByte: output.Push(s > (SByte)right); return;
                        case TypeCode.Single: output.Push(s > (Single)right); return;
                        case TypeCode.UInt16: output.Push(s > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(s > (UInt32)right); return;
                    }
                    break;

                case TypeCode.Int32:
                    int i = (Int32)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(i > (Byte)right); return;
                        case TypeCode.Char: output.Push(i > (Char)right); return;
                        case TypeCode.Decimal: output.Push(i > (Decimal)right); return;
                        case TypeCode.Double: output.Push(i > (Double)right); return;
                        case TypeCode.Int16: output.Push(i > (Int16)right); return;
                        case TypeCode.Int32: output.Push(i > (Int32)right); return;
                        case TypeCode.Int64: output.Push(i > (Int64)right); return;
                        case TypeCode.SByte: output.Push(i > (SByte)right); return;
                        case TypeCode.Single: output.Push(i > (Single)right); return;
                        case TypeCode.UInt16: output.Push(i > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(i > (UInt32)right); return;
                    }
                    break;

                case TypeCode.Int64:
                    long l = (Int64)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(l > (Byte)right); return;
                        case TypeCode.Char: output.Push(l > (Char)right); return;
                        case TypeCode.Decimal: output.Push(l > (Decimal)right); return;
                        case TypeCode.Double: output.Push(l > (Double)right); return;
                        case TypeCode.Int16: output.Push(l > (Int16)right); return;
                        case TypeCode.Int32: output.Push(l > (Int32)right); return;
                        case TypeCode.Int64: output.Push(l > (Int64)right); return;
                        case TypeCode.SByte: output.Push(l > (SByte)right); return;
                        case TypeCode.Single: output.Push(l > (Single)right); return;
                        case TypeCode.UInt16: output.Push(l > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(l > (UInt32)right); return;
                    }
                    break;

                case TypeCode.SByte:
                    sbyte sb = (SByte)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(sb > (Byte)right); return;
                        case TypeCode.Char: output.Push(sb > (Char)right); return;
                        case TypeCode.Decimal: output.Push(sb > (Decimal)right); return;
                        case TypeCode.Double: output.Push(sb > (Double)right); return;
                        case TypeCode.Int16: output.Push(sb > (Int16)right); return;
                        case TypeCode.Int32: output.Push(sb > (Int32)right); return;
                        case TypeCode.Int64: output.Push(sb > (Int64)right); return;
                        case TypeCode.SByte: output.Push(sb > (SByte)right); return;
                        case TypeCode.Single: output.Push(sb > (Single)right); return;
                        case TypeCode.UInt16: output.Push(sb > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(sb > (UInt32)right); return;
                    }
                    break;

                case TypeCode.Single:
                    float f = (Single)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(f > (Byte)right); return;
                        case TypeCode.Char: output.Push(f > (Char)right); return;
                        case TypeCode.Double: output.Push(f > (Double)right); return;
                        case TypeCode.Int16: output.Push(f > (Int16)right); return;
                        case TypeCode.Int32: output.Push(f > (Int32)right); return;
                        case TypeCode.Int64: output.Push(f > (Int64)right); return;
                        case TypeCode.SByte: output.Push(f > (SByte)right); return;
                        case TypeCode.Single: output.Push(f > (Single)right); return;
                        case TypeCode.UInt16: output.Push(f > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(f > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(f > (UInt64)right); return;
                    }
                    break;

                case TypeCode.UInt16:
                    ushort us = (UInt16)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(us > (Byte)right); return;
                        case TypeCode.Char: output.Push(us > (Char)right); return;
                        case TypeCode.Decimal: output.Push(us > (Decimal)right); return;
                        case TypeCode.Double: output.Push(us > (Double)right); return;
                        case TypeCode.Int16: output.Push(us > (Int16)right); return;
                        case TypeCode.Int32: output.Push(us > (Int32)right); return;
                        case TypeCode.Int64: output.Push(us > (Int64)right); return;
                        case TypeCode.SByte: output.Push(us > (SByte)right); return;
                        case TypeCode.Single: output.Push(us > (Single)right); return;
                        case TypeCode.UInt16: output.Push(us > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(us > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(us > (UInt64)right); return;
                    }
                    break;

                case TypeCode.UInt32:
                    uint ui = (UInt32)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(ui > (Byte)right); return;
                        case TypeCode.Char: output.Push(ui > (Char)right); return;
                        case TypeCode.Decimal: output.Push(ui > (Decimal)right); return;
                        case TypeCode.Double: output.Push(ui > (Double)right); return;
                        case TypeCode.Int16: output.Push(ui > (Int16)right); return;
                        case TypeCode.Int32: output.Push(ui > (Int32)right); return;
                        case TypeCode.Int64: output.Push(ui > (Int64)right); return;
                        case TypeCode.SByte: output.Push(ui > (SByte)right); return;
                        case TypeCode.Single: output.Push(ui > (Single)right); return;
                        case TypeCode.UInt16: output.Push(ui > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(ui > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(ui > (UInt64)right); return;
                    }
                    break;

                case TypeCode.UInt64:
                    ulong ul = (UInt64)left;
                    switch (tcr)
                    {
                        case TypeCode.Byte: output.Push(ul > (Byte)right); return;
                        case TypeCode.Char: output.Push(ul > (Char)right); return;
                        case TypeCode.Decimal: output.Push(ul > (Decimal)right); return;
                        case TypeCode.Double: output.Push(ul > (Double)right); return;
                        case TypeCode.Single: output.Push(ul > (Single)right); return;
                        case TypeCode.UInt16: output.Push(ul > (UInt16)right); return;
                        case TypeCode.UInt32: output.Push(ul > (UInt32)right); return;
                        case TypeCode.UInt64: output.Push(ul > (UInt64)right); return;
                    }
                    break;
            }

            // Invalid operation
            throw new InvalidOperatorTypesException(">", left, right);
        }
    }
}

